如果你不固执，你会过早放弃实验。如果你不灵活，你会把头撞在墙上，看不到你试图解决的问题的不同解决方案。
If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.
I'm not a rapper, I'm a rock star who raps.
The theory of computation is not just about solving problems, but also about understanding the limits of what can be computed.
Picture books are like little pieces of art that you can hold in your hands.
